v3 to v4 - missed one

Author: GroG

.github/workflows/build.yml

@@ -83,7 +83,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Download Artifact
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: myrobotlab
           path: target/